Electromagnetic fuel pump for a common rail fuel injection system
US5749717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Sep 12, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/48
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump for a fuel injection system, the pump primarily including a pump body having a pumping chamber and a pump body end portion, a control valve disposed in a control valve chamber, a reciprocatable plunger, and a cylindrical sleeve having first and second end portions. The first end portion of the sleeve interfits with the pump body end portion. The second end portion of the sleeve slidably interfits with a cam follower assembly for allowing the cam follower assembly to drive the plunger. The plunger is reciprocated with respect to the sleeve over a stroke range between an extended position and a retracted position. A plunger spring biases the plunger to the retracted position. The pump body end portion is press-fit into the first end portion of the sleeve, and sufficiently induces compressive forces in the pump body for acting on the pumping chamber to oppose pumping chamber expansive forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.